These are chain link 'dog run' panels, 6x6. I thought they were secure. The first photo is what the fence is supposed to look like. The following photos are the aftermath of whatever got to it and bent and tore at the metal. This occurred in three different places around the pen. The pen consisted of 6 panels affixed in a cube structure: top, bottom, all sides. I thought my hens were safe. They were not. Whatever the predator was, it was small enough to get in through these openings as well as get into the hen house through a 12x12 hen door and kill at least one hen in there. This all happened in broad daylight. We were not at home that morning. There was nothing left except feathers scattered all around the enclosure and just outside the enclosure (the wind had begun to blow when I discovered I'd lost my sweet hens, so I don't know if the feathers outside the pen had blown there or been left there by the predator. For the record, I have tried and cannot begin to bend the metal as it is here. What kind of predator has this kind of strength, yet is small enough to have gain passage where it did?